Snapshot A 46-year-old man presents to the emergency department with nausea, vomiting, constipation for the past 2 days. He also complains of abdominal pain that initially started at the periumbilical area then traveled to the right lower quadrant. He is tachycardic, febrile, and mildly hypertensive on examination. A physical examination demonstrates a diffusely tender abdominal with rebound, especially at the right lower quadrant. Introduction Clinical definition login to view 2 more bullets Epidemiology login to view 3 more bullets Pathogenesis login to view 12 more bullets Presentation Symptoms login to view 7 more bullets Physical exam login to view 9 more bullets Imaging Abdominopelvic computed tomography (CT) with IV contrast login to view 2 more bullets Ultrasound login to view 3 more bullets Magnetic resonance imaging (MRI) login to view 1 more bullet Studies Serum pregnancy test login to view 1 more bullet White blood cell count with differential login to view 1 more bullet Differential Ectopic pregnancy login to view 2 more bullets Ovarian/fallopian tube torsion login to view 2 more bullets Renal colic login to view 2 more bullets Psoas abscess login to view 3 more bullets Treatment Non-perforated appendicitis login to view 5 more bullets Perforated appendicitis with hemodynamic instability, sepsis, free perforation, or peritonitis login to view 3 more bullets Stable perforated appendicitis login to view 4 more bullets Prognosis, Prevention, and Complications Perforation login to view 1 more bullet Periappendiceal abscess login to view 1 more bullet Pylephlebitis login to view 2 more bullets Septicemia Subphrenic abscess login to view 2 more bullets Death